With the recent band openings, I've done some research and in addition to the dozens upon dozens of pagers in the 26-28 MHz band and 29.7-30 MHz band, the UK use
31.725 MHz
31.750 MHz
31.775 MHz
and I've noted POCSAG signals on 31.75 MHz with just a handheld scanner and a telescopic antenna (CB/11m/10m base loaded antenna, roughly 50" long fully extended).
Looking forward to more band openings on 11 meters, 10 meters, the VHF low band and 6 meters. Lots of interesting signals in the 26-28 MHz, 29.7 MHz to 30 MHz and 30-50 MHz low band coming out of the UK, Europe, Latin America...